CVE-2018-5520

Severity: medium (CVSS 4.4 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-05-02 · updated 2026-06-17
Weakness: CWE-863

Description

On an F5 BIG-IP 13.0.0-13.1.0.5, 12.1.0-12.1.3.1, or 11.2.1-11.6.3.1 system configured in Appliance mode, the TMOS Shell (tmsh) may allow an administrative user to use the dig utility to gain unauthorized access to file system resources.

Affected products

F5 BIG-IP APM: from 11.2.1 through 11.6.3; from 12.1.0 through 12.1.3; from 13.0.0 through 13.1.0
BIG-IP: from 11.2.1 through 11.6.3; from 12.1.0 through 12.1.3; from 13.0.0 through 13.1.0
F5 Big-Ip Analytics: from 11.2.1 through 11.6.3; from 12.1.0 through 12.1.3; from 13.0.0 through 13.1.0
F5 Networks, Inc. BIG-IP (AAM): from 11.2.1 through 11.6.3; from 12.1.0 through 12.1.3; from 13.0.0 through 13.1.0
BIG-IP ASM: from 11.2.1 through 11.6.3; from 12.1.0 through 12.1.3; from 13.0.0 through 13.1.0
F5 BIG-IP DNS: from 11.2.1 through 11.6.3; from 12.1.0 through 12.1.3; from 13.0.0 through 13.1.0
F5 Big-Ip Edge Gateway: from 11.2.1 through 11.6.3; from 12.1.0 through 12.1.3; from 13.0.0 through 13.1.0
F5 Big-Ip Global Traffic Manager: from 11.2.1 through 11.6.3; from 12.1.0 through 12.1.3; from 13.0.0 through 13.1.0
F5 Big-Ip Link Controller: from 11.2.1 through 11.6.3; from 12.1.0 through 12.1.3; from 13.0.0 through 13.1.0
F5 BIG-IP (LTM): from 11.2.1 through 11.6.3; from 12.1.0 through 12.1.3; from 13.0.0 through 13.1.0
F5 Networks, Inc. BIG-IP (PEM): from 11.2.1 through 11.6.3; from 12.1.0 through 12.1.3; from 13.0.0 through 13.1.0
F5 Big-Ip Webaccelerator: from 11.2.1 through 11.6.3; from 12.1.0 through 12.1.3; from 13.0.0 through 13.1.0
F5 Big-Ip Websafe: from 11.2.1 through 11.6.3; from 12.1.0 through 12.1.3; from 13.0.0 through 13.1.0

References

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